Quasi-Second Order ΣΔ Modulator Based on Phase-Integration

نویسندگان

  • Hervé Caracciolo
  • Edoardo Bonizzoni
  • Franco Maloberti
چکیده

A sigma delta modulator incorporating a linear phase integrator instead of a conventional voltage-domain integrator is described. The architecture allows achieving a quasi-second order noise shaping by using a passive SC low-pass filter in the first stage. Simulation results demonstrate that the circuit can operate with sampling frequencies of hundred of MHz while obtaining a figure of merit (FoM) well ahead of the state-of-the-art.

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تاریخ انتشار 2007